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Part 14. Disorders of the Gastrointestinal System > Section 1. Disorders of the Alimentary Tract >
Chapter 290. Approach to the Patient with Gastrointestinal Disease
Anatomic Considerations, Functions of the Gastrointestinal Tract, Extrinsic Modulation of Gut Function, Overview of Gastrointestinal Diseases, Evaluation of the Patient with Gastrointestinal Disease, Further Readings.
The gastrointestinal (GI) tract extends from the mouth to the anus and is composed of several organs with distinct functions. Specialized independently controlled thickened sphincters that assist in gut compartmentalization separate the organs. The gut wall is organized into well-defined layers that contribute to functional activities in each region. The mucosa is a barrier to luminal contents or as a site for transfer of fluids or nutrients. Gut smooth muscle mediates propulsion from one region to the next. Many GI organs possess a serosal layer that provides a supportive foundation but that also permits external input...."
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